Jerry,

That's true (it's also true if you accidentally IPL a test system using the 
production paging subsystem) that corrupting/losing critical DASD will cause 
z/OS to fall over.  However, I believe the OP mentioned that the SEs were 
restarted as well.  I don't recall if the z14 has internal battery backup for 
the SE's or not, but if not, IBM made (in my opinion) a mistake moving from 
laptops with internal batteries to 1u "pizza boxes" for the SEs without BBU.  
It sure smells to me like there was some kind of power issue that impacted both 
of the power feeds coming in to the z14.  

Rex

-----Original Message-----
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of 
Jerry Whitteridge
Sent: Thursday, October 17, 2019 5:15 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [External] Re: Power failure

I seem to remember that Peter mentioned that they may have had an outage on 
their Storage Subsystem - if you ripped away all the DASD from under z/OS I'll 
guarantee you'll be reIPL'ing

Jerry Whitteridge
Delivery Manager / Mainframe Architect
GTS - Safeway Account
602 527 4871 Mobile
jerry.whitteri...@ibm.com

IBM Services

IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> wrote on
10/17/2019 03:01:57 PM:

> From: Mike Schwab <mike.a.sch...@gmail.com>
> To: IBM-MAIN@LISTSERV.UA.EDU
> Date: 10/17/2019 02:50 PM
> Subject: [EXTERNAL] Re: Power failure
> Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU>
>
> I agree.  By mistake both power cords lead to the same UPS, or even 
> the same breaker.  Pick a low impact time.  Turn each breaker off for
> 1 minute then turn back on.  Look for anything that went down and 
> change outlets as needed.  Then power off each UPS to check for 
> different breakers but same UPS.  Or isn't there a device that will 
> send a signal over the line and you can determine which outlets are 
> wired to that breaker? Or is that only phone / network lines?
>
> On Thu, Oct 17, 2019 at 10:27 AM Tom Marchant 
> <0000000a2a8c2020-dmarc-requ...@listserv.ua.edu> wrote:
> >
> > On Thu, 17 Oct 2019 11:41:24 +0400, Peter wrote:
> >
> > >We have a dual... connectivity from UPS wired to z14.
> > >
> > >Even if one goes down and another would take a control
> >
> > That's what you said.
> >
> > Some of us are skeptical that it is actually implemented the way 
> > that you intended that it be implemented.
> >
> > --
> > Tom Marchant
> >
> > --------------------------------------------------------------------
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> > IBM-MAIN
>
>
>
> --
> Mike A Schwab, Springfield IL USA
> Where do Forest Rangers go to get away from it all?
>
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